Function try_execute_stack 

pub fn try_execute_stack<'a, R: Runtime, K: AutotuneKey, I: TuneInputs, O: AutotuneOutput>(
    name: &str,
    device_id: &str,
    client: &ComputeClient<R>,
    set: Arc<TunableSet<K, I, O>>,
    input: I::At<'a>,
) -> Result<O, AutotuneError>

Fallible full-stack path. Actual request execution is performed ONCE after selection; an execution error invalidates future choices but is never silently replayed on another kernel. Requires an installed controller, an in-range explicit reference and an exact workload signature on the set. Missing metadata returns AutotuneError before live execution.